Chain-feed saw.



A. W. NELSON.

CHAUX YER!) SAW.

f-.PBLICMLION ULEB mv, 2o, ,m1

v "Eaented Sept. 35, 1914.

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5 SEEETS-SHEBT 1.

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A. W'. NELSON. GHAKIN FEED SAW. APPLICATION FLED NOV. 29, 1911. L119,?@9 Patented Sept. 15, 1914` 5 SHEETS-SHEET 3 WMM/@wao A. W. NELSON.CHAIN FEED SAW.

APPLICATION FILED NOV. 29, 1911.

1,110,709. Patented Sept. 15, 19ML;

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Yllllmlnllll* lllllllllllllll- WVM/Leases i l MQW A. W. NELSN.

CHAIN FEED SAW. APPLmATIoN FILED Nov.`29, 1911.

1,1 10,709, Patented sept. 15,1914.

5 SHEETS-SHEET 5` N Q v l 1 B t NB Y 3Q@ Y k l J' lvl .OB :fl/ swf qo\-J Y 1^ s /l f e @mi/buenas fr lilla-rit it will lili l.' ith@ ARTHUR"vll". NELSGTJ, OF WILLJATJSPGR-l, ENNSYLVANA, ASSGNOR, BY MESNEASSGNMENTS, l WALDEQTAE GERTSEN, OF CHICAGO, XLLINOIS.

ennnrrnno saw.

Specification o Letters- Patent.

1. All

tented (slept. l5, infile-.1

To @El whom t may concern Be it known that l, ARTHUR Y?. NELSON, acitizen el' the United States, residing at ll'illiamspert, .in thecounty of Lycoming and State el" Pennsylvania Ahave invented a new anduseful Chain-l1" eelltlaw, of which the 'tollowing is a specification.

This invention has reference to improvements in sawing machines whereinthe feed to the saw is by means of a chain, and its object to providesawing machine of this 'type wherein the saws may be used in gangs,wherein the sans .may be accurately adjusted te the work, 'whereinlumber may he san'ed into numerous strips simultaneously, and whereinthe machine is generally' iniproved in structure and operation l'or theperformance ot the work 'lier which the ma thine is especially7designed..

In accordance with the present invention there is provided a saw arborso mounted as to be capable or adjustments whereby a gang of sawsmounted in spaced relation en the arbor may be accurately adjusted tothe feed structures a d the feed mechanism in the form of an endlesschain so related to the saws that the worl; is fed. to the saws positively. 'lhe saws are arranged in overriding relation to the chain feedand the latter is grooved iior the passage of the teeth et' 'the sawbelow the plane oi"0 the feed se to cnt entirely through the materiallodged on the leed chain, and in order that the teeth of the saws mayleave the material operated upon in a direction approachingperpendicular relation to the surface ot the material, the active edgesoi the saws more in a direction away from the lined chain, whereforethere is provi( ed a presser member holding the work against theV feedchain immediately adjacent to the exit portions ol" the saws.

The present invention also fnmtemplates supporting and guiding membersfor the chain feed in its active run and means lor lubricating the chainwhich is liable to heroine contaminated with sawdust.

'lhe invention also contemplates improvements in the structure oitdiiierent parts thereoit whereby the chain feed and saw structure aremade particularly efficient in operation.

The invention will be best understood from a consideration ot thefollowing detailed description, taken in connection with theaccompanying drawings forming a part of this specification, with theunderstanding, however, that. while in the drawings there is shown apractical embodiment of the invention the latter is not continedto vanystrict eonforniity to the showing of the drawings since it issusceptible of changes and niodications whereby other einbodi ments arepossible while still retaining the salient features oi' the invention.

Figure l is a perspective View of the improved machine. Fig. Q. is aplan View thereof, llig. 3 is section on the line 3-3 of Fig. i2 withthe saw arbor, journal box and some adjacent parts nearer to theobserver than the line of section shown in elevation. Fig. 4 is asection on the line fie-4 oi' Fic. 2. Fig. 5 is a section on the line.SM5 of Fig. B with some parts omitted. t) is section on the line 5-6 ofFig. l but drawn to a larger scale. Fig. 7 is a section on the line 7-7oit' Fig. 6 but drawn to a. larger scale. Fig, 8 is a. section on theline 8-8 et Fig. 2 but drawn tol a larger scale. 9 is a detail sectionof an adjusting means.

Referring to the drawings there is shown a iframe comprising two mainsupporting members l, 2, connected in spaced relation by cross bars 3and 4, the cross bars 3 being shown as oi channel form and connectingthe members 'l and 2 near the lower portions et the ends thereolwvhilethe members -l are shown as olf square cross section and seated inrecessed portions 5 of the upper edges ol the members 1 and 2 near theends thereof, the members l being prolonged beyond the enter face of themember 1 for purpose which will hereinafter appear. The framework may,of course, be otherwise constructed than as shown and described.

As shown in the drawings the frame members 1 and 2 are of web and flangeconstruction and thetrnember l is somewhat higher than the member 2, thelatter being formed with an intermediate raised portion 6 for a purposewhich will hereinafter appear.

rl`he outer upper edge of the member l is formed with an overhangingliange 7 extending substantially the whole length of the member 1 andimmediately beneath the flange the member 1 is formed with a bearingface 8 parallel with the flange 7. Secured to theouter face of themember 1 at a lower level than the bearing face 8 is a bracket 9provided along one edge with a 'right angle lflange lOlby means of whichthe bracket 9 is secured to the member 1 in any appropriate manner andthe bracket 9 carries ya wear plate 11.

Secured to the outstanding portions of the bars 4 is an elongated table12 made fast to the bars 4 by screws 13 or in any other appropriatemanner, and this table, which ymay be provided with s tiening webs aboutthe edges, is provided along one long edge with a longitudinallyarranged flange 14 facing the bearing face 8' of the member l. Securedtothe under face of the table 12 is a block 15 traversed by a rod 16 atoneend traversing the member 1 and terminating in a threaded end, the otherend being squared as indicated at 17 for the application of a suitabletool-v whereby the rod 16 may be rotated as desired for a purpose thatwill hereinafter appear.

-The wear plate 11 is secured to the bracket 9 by screws -18 and isdesigned to support a feed chain composed of a series of connected links19, each link being formed at one end with a tongue 20 and at the otherend with parallel ears 21 designed to receive a corresponding tongue 20and traversed by a pivot pin 22 also traversing the corresponding tongue20 seated between the ears. The chain is in effect a dat solid metalliclink chain of appropriate flexibility, the links being comparativelyshort.

Each link is formed on one side with a plane face Adesigned to engageagainst the bearing face 8, while on the other'side near one face eachlink is formed with a tongue 23 elongated in the direction of the lengthof the link and designed to engage under the flange 14 of the table 12,the expressions of osition being with reference to the machine 1noperative position. Each link is provided on one face with a series oflongitudinal parallel grooves 24 consisting of a centrally arrangedgroove and side grooves spaced from each other and from the centralgroove, the grooves of each link alining with those of the adjoininglinks.

On the frame member 1 about midway of the length thereof and on what maybe termed the inner face of the leg member are spaced bearings 25 for aspindle 26 which in operation is substantially upright, and this`spindle has at the u )per enda piurnal bearing 27 provided wit '1 a capmen'lber 28. The journal bearing 27 has formed on one end thereof aframe 29 of substantially rectangular contour and at the end of theframe 29 remote from the bearing 27 there is formed another journalbearing 30 in turn provided with a cap member 31. The bearings 27 and 30are in alinement' and are designed to receive a shaft32 constituting a'saw arbor, the shaft or arbor 32 having fast thereto, within the spacedefined by the frame 29, a pulley 33 for the reception of a belt,whereby rotative movement may be imparted to the arbor 32, but the beltis not shown in the drawings, belt drive being a common means ofimparting motion to Asaw arbors. Each cap member 28 and 3l is providedwith a lubricant receptacles 34 in turn provided with a cover plate 35held in place by a screw. 36. To stiften the structure there is provideda brace bar 37 made fast at one end to the spindle 26 near the lower endthereof and at the other end to a 'lug 38 on the bearing 30.

The saw arbor 32 is prolonged beyond the bearing 27 and there has anannular ange 39 on it so. that the arbor may receive a gang of saws 40'separated one from the other by rings 41 all held together and againstthe' i flange 39 by a head 42 'and clamp nut 43.

he saws 4() are spaced in conformity with the spacing of the grooves 24of the links 19 of the chain, which latter, as will hereinafter' appear,constitutes" a chain drive and the number of-saws may or may not equalthe number of grooves in the series, but the spacing of the saws issuehas to bring these saws substantially into conformity with respectivegrooves 24, the arrangement being such that the saws may enter thegrooves for an appropriate distance.

ln order to determine the relation ofthe saws to the grooves so far asthe depth of entrance of the saws into the grooves is concerned there isprovided a screw 44 extending through a suitably tapped boss 45 on oneside of the bearing 27 andone end of' this screw 44 bears against thetop of the member l, while the other end of the/screw is appropriatelysquared, as shown at 46, or otherwise suitably shaped for theapplication of a manipulating tool. Because of the spindle 26 and itsbearings 25 the screw 44 will move the whole structure carried by thespindle 26 in an up or down direction, so that the saw blades may beappropriately adjusted with relation to their depth of entrance into thegrooves 24. To provide for this adjustment the bearing 30 may bearranged a short distance above the upper edge of the frame member 2 andan abutment angle member or bracket 47 is made fast to the upperedge ofthe raised portion 6 of the member 2, being held thereto by a set screw48. while that leg of the bracket resting on the raised portion (3 mayhave a slot 49 formed therein to admit of movement of the bracket 47with relation to the member 2.' To hold the end of the bearing framecarrying the bearing member 30 in adjusted positions, the bracket 47 istraversed bya screw 50 entering the bearing member 30 and when tightenedserving to `traversed by a set screw 52, which latter maybe providedwith a lock'nut 53 and the screw 42 bearin against that leg of thebracket 47 containing the slot 49 serves to adjust the bracket 47 whenthe screw 48 is loosened to turn the bearing frame and the saw arborcarried thereby about the longitudinal axis of the spindle 26, whereforethe saws 40 may be brought into proper relation to the grooves 24 withreference to the planes of travel of the grooves, that is, the planes ofrotation of the saws are ,thereby brought .into coincidence with thelanes of travel of the res ective grooves. T 1e threaded end of the ro16 engages in the cap member of the upper bearing 25 so that when thesaws are adjusted this bearing may be v tightened against the spindle 26clamping it in the adj usted position, wherefore the relation of thesaws and grooves having been set will be maintained until purposelychanged.

At the ends of the bracket 9 and at a lower level the frame member 1 isprovided with bearings for respective shafts 54and 55, al-

though the shaft 55 may be stationary.v

These two shafts carry adjacent to the outer wall of the member 1pulleys 56, 57, respectively, about which the chain made up of the links19 passes. The pulleys 56 and 57 are shown as provided with polygonalperipheries, they being hexagonal in the particular showing of thedrawings, and are shaped into conformity with the lin rs of the chain..The pulley 56 is, as will hereinafter appear, a drive pulley, while thepulley 57 may be simply an idler, being held to the-shatt 55 by a set'collar 5S, or in any other suitable manner. The shaft o5 extends acrossthe space between the members 1 and 2 and is supported at theappropriate end of the member 2 while this snaft carries one end of anarm 59, the other end of which supports an idler pulley 60 over whichthe drive belt for the pulley 33 may pass. The shaft 54 also traversesthe space between the members l and 2 and is provided with a suitablejournal bearing in the member 2 and extends therebeyond. Keyed to theshaft 54 but outside the member 2, is a gear wheel 61 in mesh with apinion 62 on a stub shaft 63 fast to and projecting from the outer faceof the member 2. The pinion 62 is formed in one piece witha gear wheel64 carried by-the stub shaft 63 and this gear wheel is in mesh with apinion 65 loosely mounted on the shaft 54, the gear4 wheel 65 being inone piece with a pulley 66 likewise loosely mounted on the shaft 54. Forpurposes of protection the member 2 carries a shield 67 in part 4housingthe gearing justreferred' to. The

pulley 66 is designed to be driven by a belt coming from a suitablesource of power, while the ti'ain of gearingmadc' up of the inion .65,gear wheel 64, pinion 62 and gear wheel 61 will impart to the shaft 54 aspeed of rotation greatly reduced with respect to the speed of rotationof the pulley 66, wherefore the shaft 54 even if ultimately driven fromthe saine source of power as the saw arbor will rotate at a greatlyreduced speed. The shaft 54 imparts motion to the chain drive and inpractice the direction of motion lof this chain drive is from right toleft asI viewed in Fig. 1, while the saw arbor is rotated in the samedirection as the shalt 54 so that the saws will rotate in a counter-'clockwise direction as viewed in Fig. 1, and, therefore, the saw teethwhere passing along the grooves 24 will move in a direction opposite thedirection of travel of the chain.

Carried by the inner face of the frame i member l on opposite sides ofthe spindle 26 are bearings 68, 69, respectively, there being twobearings 68 one above the other and two bearings 69 one above the other,and these bearings are shaped to receive and guide bars 70, 71',respectively, the bars being preferably rectangular in cross section andthe bearings conforming to such shape, although any arrangement of barsand bearings which will peiimit longitudinal movement of the barswithout rotative movement thereof will answer. The bar has fast to it atthe upper end a block 72 from which projects a spindle 73 carrying aroller 74 in operative relation to the upper run of the chain belt ordiive.` The bar 71 carries atits upper end a block 75 carrying a spindle76 upon which is mounted a roller 77 in operative relation to the chainbili or drive, the roller 74 being in trailing relation to the saws40-and the roller 77 being in advanced relation thereto.

The inner face of the frame member 1 is provided with other alinedbearings 7 8 in spaced relation one to the other, and these bearings areprovided fora bar 7 9 similar to the bars 70 and 71 and at whatconstitutes the upper end of thevbar 79 there provided a spindle 8Ocarrying a roller 81, while the lower end of the bar 7 9 is providedwith a weight S2 tending at all times to depress the roller 81.

The bar 70 has near its lower end a laten ally projecting pin 83 engagedby an arm 84 mounted at'one end on a pivot pin 85 pro-v ject-ing fromthe inner face of the member 1 and at the other end carrying anadjustable weight 86 tending at all times by engagei'nent of the arm 84with the pin 83 to depress the roller 74. The bar 71 has near its lowerend a late-rally projecting pin S7 engaged by an arm 8S mounted at oneend on a pivot pin 89 .projecting from the inner face of the member 1and near the other end ioo Carr-ying an adjustable weight 90, theweighted arm v88 tending at all times to depress the roller 77.

Mounted'on the spindle 7 3 is a pivot support and overhanging the upperportion of the frame member 1 is an arm 91 provided witha'prolon'g'ation. 92 on which is secured a weight 93 tending at alltimes to move the arm 91 and its prolongation 92 toward the upper edgeofthe frame member 1. Fast to, or in one piece with the arm 91 adjacentto'its junction with the prolonga-v tion 92 is a pendent member 94extending toward the belt made up of the links 19 in overriding relationthereto and to one side of the gang of saws. The member 94 carries aseries of parallel plates. 95 in spaced relation one to the other bymeans of spacing strips 9G, the plates and spacing strips being heldtogether and to the member 94 by means of bolts or screws 97. The plates95 are in operation substantially upright and at the lower ends arebeveled, as indicated at 98, away from the oncoming portion of the chaindrive as it approaches the saws, while the upmoving portion of the sawblades enter between the plates 95.

Fast to the upper edge of the member 1 adjacent to that end of themember carrying the pulley 57 is a guide strip 99.

v Suppose that the parts have all been properly adjusted with a suitablenumber of saws mounted on the saw arbor and these saws entering thegrooves in the links 19 to a suitable depth and in alincment with thegrooves, then assuming the saws to be rotating at .appropriate speed andthebelt made up of the links 19 moving also at appropriate speed, apiece of timber indicated at 100 in Fig. 6 is moved upon the chain drivefrom the right hand end of the machine as viewed in Figs. 1 and (i andfirst engages under the roller 81, the latter bein g lifted by thematerial to be treated quite easily, since the weight 82 may beAcomparatively light. The frictionthereby produced against thechain drivewill cause the latter to propel the piece of lumber 100 toward theroller 77 which thereupon, under the guidanceof the operator, veryfirmly engages the piece of lumber 100 and holds it against the chaindrive with ample force to cause t'he latter to propel the lumber 100 tovthe saw, However, just prior to reaching thel saw the lumber engagesunder thebevel ends of the plates 95 and the wright, 91? aeting on theseplates .serves to hold that portion of the lumber whore presented toth-r saw in" firm engagement with the chain drive, the roller 77ooacting.

lt will be observed that the saw in traveling through the lumber ismoving upwardly, thus tending to lift the lumber Istrip away from thechain drive. but this action is overcome and prevented by the effect ofthe plates 95 urged by the'weight 93 and by the roller 77 urged by theweight 90, so that the saws will act upon the lumber without ef` 40mounted on the arbor,.the saws passing completely through the lumberdespite the fact that thelumber is engaged on one face by the drivingmechanism and that the saws are directly over such driving member. It isto be observed that the pressure member of which the plates 95 form theactive portion engages the lumber at the point where the saw teeth leaveit, so that the saw teeth can exert upon the lumber no lifting actionwhich is not directly counteracted by the holding member made up of theplates 95 and coacting parts, this holding member lvengaging the lumberwithin the limits of the peripheries of the saws, or so closely to theperipheries of the saws as to effectively prevent the uprunning portionsof the saws from lifting the lumber away from the driving member. i i

Since the chain drive must be rigidly supf ported to withstand thepressure exerted upon the lumber and through it upon the chain, there isa liability ofthe production of considerable friction where the cha-indrive passes overl its supports, wherefore the wear plate 11 isprovided, and to reduce the friction caused by such engagement, thatportion of the drive chain engaging the It will be observed that thelumcondition about the lower run 'of the chain 'has in overridingrelation thereto a box 101 made fast to the frame member 1 and 'thatedge of the box toward the oncoming portion of the lower run of thechain is inl angle or bevel relation thereto, such edge being indicatedat 102, and to this beveled edge there is secured a scraper blade 103 inposition to engage those faces of the links 19 remote from the groovedfaces thereof, while within the box there is lodged a mass of suitablematerial indicated at ,104, of which waste may be taken asian example,and this material 104 may carry lubricating material of any suitabletype. Then the machine is in operation those faces of the linksI 19which engage the wear plate 11. are boing constantly subjected to thescraping action of the blade 103` to remove any ad` hei-cnt materialliable to produce friction and mnnediately afterward the links arebrought into wipmg relation with the waste lllO 'porting freine, a tablecarried the :iii :logon rollers Tel and 77 toward the feed chaintheloars T0 and 71 each carries a bracket 105 provided .vith a set screw106 positioned to engage the top of the frame ineinher l when apredetermined lower limit of travel of the respective roller 71k or 77has been reached. This liinit may he changed at any 'time hy a suitableadjustment oi the set screw 10G.

What is claimed isz- 1, In a chain f ed sawing machine? a table forsupporting the Work, a feeding chain ranged at one side of the table andc0inprising an endless series et liat solidv inetallie links hingedtogether end to end, each link having a longitudinally grooved activetace plane throughout and with the grooves of the links alinedthroughout the eheinj ando savv located ahove the active run et thefeeding chain in close proximity thereto and adapted to have its teethenter the groo ot the links to a depth heloiv the ton el? the supportingtahle, whereby the sani teeth are caused to out entirely Athrcnighmeteri-il lodged on the said chain.

ln a chain feed sawing machine, a i

supporting rznne sind tahle having; coactf gnideways, a feeding; ehniinrunning in gnideways and composed oit an endless sc -n of one-piece flotmetallic links hing i' gether nt the ends and each link ha 'plane activetaee l'iiovided with a of hmgitudinnl parallel grooves exto the tnlllength of tl j: links' and the plane faces ot the links heir-.3.1;`novalule in suhstantially the plane olf 'he top et the tal'ile7 andineens ton carrying a Series ol" naive allieve ind in close ,iroxiiinityto the active run et the feeding.; chain with the teeth of the ,sawsentering; the grooves of the chain to a depth hclow the top et thetahle, WhereL hy the sew teeth areeznised to en u entirely vthroughinnterizil lodged on the said chain.

3. ln n circular .s'nw chain feed sawing machineK n lending fzhziin`thinnest-l oi' an endlos" eei'ics of one-piece flat metallic linlis,

each hinged at its: endsy lo the meeting ends oli the next :nl iaeentlinks :end havini' :i plane longgilinliimlly `grooved sin ieeeivinnjworkinglj l'nee with the grooves in the umkiner lures nl the links:dining throughout thc chain. i

fl.. ln a irenlnr saw chain lived sawing newline, a teeming; ehn "iconny-eend ol' an endless series ol' one-nieeo la; nielullic linl-i,euch hinged at its ends to the meeting ends ln a eliain 'leed sawingmachinet a .snp-

por'lingj traine, and an elongnted table ear ried therein in spacedrelation thereto, the trarne :ind the table being each. provided with annndereut guiding groove, a feeding elnlin compri an endless series ofone* piece metallic linli F` hinged end to end :1nd at the edgesentering the said grooves, @ich link of the chain having a plane active.7th n laterally extended series o' lated loi'igitndinal grooves theren*e the grooves the adjethron 'hout the length et the elniin5 end. sigang it saws located. above the feed iin and adapted to have the teeththere(` enter the groove in the chain to e depth ,helow the top of thesupporting table, whereby the saw teeth are caused to ont entirelythrough material lodged on the said chain. Y

f3. lo a chain feed sawing machine, an endlees ehnin n :ide up olione-pieee x'netnllie links gizeh plane on the acti' 'tace and therenrevided with e of longitudinal 'ooves inniiehing those olf theadjaeentlinks, ieh link heine* di tly' pivoted at the ends the ne, z riait .links and provided :ill/npr one c ivi. 'a lntei ily predicting onnnfsupporting haendler tor the active run nl' the e oiy r whieli Said runtravels, e. lahle ""ace. the active vnn of the chain und hamnirannndfzn'ent enffging -portion for the tongues ot the links the chain,undercut sunnortin ien'iher for the edge oli the chain r nete frein thetongues and saw carrying ineinher for holiflinn" gang" of? sen/e inoperative ,relation to the aetive inn of l chain i ith the teeth of thesalve e: ine {.gzoev s in'the chain.'

7; ln :i e" ein 'i ,ed Sewing inaenine, an endless eniin vmade nnone-pieee solid wich plane on 'the active face ly groei/'ed with thegrooves oi" the linlis ai .ling throngghont the chain, nach link heine'directly nivotcd at the ends to the next :nljm'fe it linksl andi'iroviiled along one edge w h n, nerally projecting tongue. a Snnnorinio'ieinnei: for the active run of the eheh eve? which the said rnntravels, :t inl/lo animent to thc ,said notive run of the chirin having:in ond/.wint portion 'for en- ,ing he long/'ues et the rhein, :nid ani; nnilercnt nieniher 'igor enganingg the other edge of the chain, a sawearrydngl ineinher l'or holding n .suiv :ihove :ind in operative.relation to the :idlive nun olf ille ehnin with lhe teeth ol' the .sa ventering ihe Agrooves in ,the links lo n depth helow the top olt the:sujn pol-thief l'ahlej whereby the saw' teeth are caused to cutentirely through material lodged on the said chain.

8. Ina chain feed sawing machine, a saw, and a feeding chain composed ofan endless series of one-piece metallic links, each hinged at its endsto the next adjacentlinks and having a Hat working face and providedtheir adjacent ends, each link having a fiat working face and providedtherein with a central longitudinal groove extending across the hingejoint and registering with the grooves of the adjacent links and forminga continuous groove at 'the active run of the feeding chain, and acentrally arranged saw located above the feeding chain, the teeth of thesaw projecting into the said central y groove, whereby the saw teeth arecaused to 'run of the feedin cut entirely through material lodged on thefeeding chain.

10. In a chain feed saWin machine, a table for supporting the wor afeeding chain comprising an endless series-of flat, solid, metalliclinks hinged together end to end, leach link having a 'Hat Working faceand provided therein with a longitudinal groove extending across thehinge joint, the grooves of the 'links registering when the links assumea horizontal position so as to form a continuous groove at the activeupper j chain, said links being of greater length t an Width, a .sawlocated above the feeding chain and having its teeth projecting intosaid groove, whereby the saw teeth are caused to cut entirely throughlumber lodged von the feeding chain, and rollers mounted above the chainand on each side of the lsaw to carry the lumber through.' the saw.

In testimony, that I claim the foregoing as my own, I have heretoaffixed my signature in the-presence of two Witnesses.

- ARTHUR W. NELSON. Witnesses:

J. J. HEINTZ, Gno. S. KING.

